Motor-seating carriage for portable electric machines



F. TOOP June 11, 1940.

MOTOR-SEATING CARRIAGE FOR PORTABLE ELECTRIC MACHINES Filed May 9, 1939 amen W011, Frederic/r T 00 22.

Patented June 11, 1940 UNITED STATES MOTOR-SEATING CARRIAGE FOR PORT- ABLE ELECTRIC MACHINES Frederick Toop, York, Pa., assignor to Petco, Ina, York, Pa, a corporation of Delaware Application May 9, 1939, Serial No. 272,583

7 Claims.

This invention relates to bearings and guides in the general class of machine elements, and especially to a wheeled vehicle or bearing support to which I give the title Motor-seating carriage for a portable electric machine.

One object of the invention is to provide a carriage or truck whose upper surface is concaved in the specific manner described hereinafter so as to conform to the lower side of an electric motor casing of the shape shown in my patent application No. 212,307, so such motor casing fits snugly into the concavities of the carriage and is thereby prevented from being moved forward or rearward or laterally or rotatively with respect to the carriage; but is movable in all directions with the carriage, and can be lifted fom the carriage without any preliminary act other than manipulating a simple spring-pressed lever or latch.

A further object of the invention is to provide the rear and lateral parts of the carriage with casters to support it on a table top or other surface and enable it to be rolled in straight lines and in circuitous lines while holding the motor casing axially parallel to the supporting surface,

viz., in such relation that the transmission shaft,

or tool-carrying shaft that extends from the motor-casing, is horizontal or axially parallel with the surface on which the carriage is mounted to travel towards and from the material to be worked upon; whether said material be on or adjacent to said supporting surface; or whether said material be sheet metal to be sheared or trimmed; or whether the material is to be bored or reamed or sawed or ground or hammered.

Another object of the invention is to provide a carriage of this kind with upstanding flanges 'in the proper position as to be respectively against forwardly facing and rearwardly facing surfaces of said motor'casing so as to provide a. very simple and effective means, for cooperating with the latch in preventing forward and rearward movements of the motor casing on said carriage while being cooperative with said latch andwith an upwardly curved rear part of the carriage for preventing lateral movement of the motor casing with relation to the carriage. Another object is to provide a carriage of this 50 kind that is very rigid and strong, consistent with comparative lightness, and which is. composed of few and simple parts so as to be produced and used at. the minimum of expense. Other objects and important features are pointed out or implied in the following details of description, in connection with the accompanying drawing in which:

Fig. l is a top plan view of my motor-seating carriage, in full lines, and of a motor casing seated thereon, as indicated in broken lines, 5 via, dot-dash lines, the dotted lines indicating hidden parts that are shown. in the other views.

Fig 2 is a longitudinal vertical sectional View of the carriage, the motor-casing not here being shown.

Fig. 3 is a front end view of the carriage in full lines and in dotted lines, and of themotor casing in dot-dash lines.

Fig. 4 is a View partly in front elevation and partly in vertical cross-section, showing the socketedfront portion of the motor-casing to be seated on this carriage and secured thereon by the socket and slide-bolt in cooperation with a tangentiallygrooved stud on an upright at the front of the carriage.

Referring to the drawing in detail, in which, similar reference numerals refer to similar parts in the several views, the invention is described in detail as follows:

The main unit of the carriage is quite rigid, being preferably of cast steel or other strong metal; and it comprises a normally horizontal beam 5 having an upturned or upwardly curved rear end portion whose surface 6 is laterally concaved so as to conform to the convexed lowerrear end portion of the motor casing C. It also comprises two laterally projecting arms 1 and 8 each being united with the front end portion of the beam ,5 and being curved upward from the latter so as to provide concave seating surfaces 5 9 and I ll of proper curvatures to conform to front-lower convex portions of the motor casing C.

The motor-casing C comprises two cylindrical parts Cl and C2 in offset relation toone another and having, respectively, aforwardly facing surface C3 and arearwardly facing surface C4 at opposite sides of an elliptical section Cir which latter, when seated in the adjoining concave seats 9 and I0, being non-cylindrical, will not be rotated 5 by torque of the tool-driving shaft orspindle S while the combined weight of the motor-casing and its engagement with the slide-bolt or latch B effectually counteract the torque. The slidebolt B, which is normally seated in the tangential groove [5 of the cylindrical stud or keeper I6, would limit the turningmovement of the motor practically to Zero with respect to the carriage, even if the torquewould cause such turning movement to start. The tangentially grooved with respect to the carriage.

stud l6 projects rearwardly from an upright element H with which it is united and which is united with the front part of the arm 8; and this stud normally fits snugly but easily in a socket C6 (Fig. 4) of the motor-casing. A bore C1 in the motor-casing has the slide-bolt B therein and yieldingly held in its latching position by a compression spring C8; but when the slide-bolt is pressed inward against the spring-pressure, the socket C6 is then unobstructed sothe cylindrical stud I6 can be caused to enter therein by moving the motor-casing forward while in the position of Fig. 4; and when the motor-casing is arrested by its contact with the upright I1, and is then turned down into the substantially concave seat of the carriage, to'the position shown in Fig. 1 (in dot-dash lines), the spring C8 then pushes the slide-bolt B into .the tangential groove l5, thereby securely latching the motorcasing to the carriage.

The upturned surfaces 9 and Ill also help to prevent the motor-casing:from moving laterally An upstanding flange II is united with the rear edge of the arm 'l and normally rests against the rear upright surface C4 for aiding in preventing the motorcasing from moving rearward and sliding up the concave 6. An upstanding flange I2 is united with the front edge of the arm 8 and normally rests against the front upright surface C3 for aiding in preventing the motor-casing from moving forward with respect to the carriage.

4 kt this point, it should be understood that the main purpose of the flanges H and I2 is to relieve the slide-bolt from being battered and worn by repeated forward and rearward moveing the motor-casing or its handle, turning it through degrees to the position shown in Fig.

4, pressing the slide-bolt B inward, and pulling the motor-casing rearward from engagement with the cylindrical stud l6; and, inversely, when the user desires to use the motor-tool in conjunction with the carriage, he merely causes the stud I6 to enter the socket C6-while holding the slide-bolt B depressed, then turns the motor- ,casing from the position of Fig. 4 to that of Fig. 1 (in dot-dash lines) and releases the. slidebolt so its spring C8 pushes the slide-bolt intothe tangential groove I5 and thus secures the casing to the carriage. The carriage may be rolled on its castors l3 in any desired direction in the plane parallel to the surface on which the castor-wheels are seated for traveling movement thereon. These castors, as shown in the drawing, are pivoted in bearings M in the respective outer end portions of the arms 'I and 8 and rear part of the beam 5.

Though castors are convenient and comparatively low-cost for providing wheels for this carriage, the invention is not limited to this form of wheels nor to this manner of connecting wheels to the carriage-frame; though the castors are of considerable advantage where quick and easy lateral movements are desired.

My invention is not limited to the exact details of construction and arrangement of elements described in the foregoing, nor as shown in the drawing, for numerous changes may be made. within the scope of the inventive ideas as implied and claimed.

What I claim as my invention is:

1. In a motor-seating carriage, a rigid unit that is inclusive of a normally horizontal beam which has an upwardly curved rear end portion whose upper surface is laterally concaved and provides a snug seat for the convex rear lower portion of a motor casing of the kind shown, said unit also being inclusive of arms that project respectively rightward and leftward from the front end portion of said beam and are curved upwardly to provide concave seats for the axially oifset arcuate or convex surfaces of the front end portion of said motor casing, and supporting wheels operatively connected to the respective outer end portions of said arms in a proper relation to enable the carriage to be rolled forward and rearward with the motor casing snugly seated thereon for purposes specified.

2. The structure defined by claim 1, said wheels being elements of castors that are pivotally connected to said arms so that the carriage can be rolled laterally as well as forward and rearward.

3. The structure defined by claim 1, and a castor operatively connected to said rear end portion of the beam so as to cooperate with said wheels and rigid unit in supporting said motor casing in the axially parallel relation to a surface on which the carriage may be supported for rolling along straight and circuitous lines for purposes specified. Y

4. The structure defined by claim 1, one of said arms having an upstanding flange at its,

front edge to fit against a forwardly facing sinface of said motor casing and thus prevent forward movement of the casing with respect to the carriage, the other one of said arms having an upstanding flange at its rear edge to fit against a rearwardly facing surface of said motor casing and thereby cooperate with said curved upper surface in preventing rearward movement of said motor casing with respect to said carriage.

5. The structure defined by claim 1, said motor casing being snugly seated and fitted on said carriage in the proper relation to prevent forward and rearward and lateral and rotary movements of the motor casing with respect to said carriage and to permit said motor casing tobe lifted from said carriage without hindrance or preliminary action other than grasping the motor casing.

6. The structure defined by claiml, in combination with said motor-casing, and means to secure the motor casing against accidental displace ment from said carriage, said means being pro-. vided with a manipulative element for releasing the motor-casing from the carriage.

'7. The structure defined by claim 1, in combination with a motor casing which has a socket therein and a spring-pressed slide-bolt across said socket, said carriage having thereon a stud that is adapted to fit in said socket and is formed with a groove. for receiving said slide-bolt so as to cooperate with the latter for securing said motor casing on said carriage and permitting it to be released from the carriage by manipulation of said slide-bolt.

FREDERICK TOOP. 

